Tool-holder.



H. FISH.

TOOL HOLDER.

APPLYIOATION FILED JULY 20, 1911.

2 SHEETS-SHEET 1.

l l l l i i 1 w l i w I I l I 1 1 i 1 1 fi'r h x L Q H. FISH.

TOOL HOLDER.

APPLIOATION FILED JULY 20, 1911.

Patented May 20, 1913.

2 SHEETS-SHEET 2.

Guam 011s UNITED STATES PATENT OFFICE."-

HAROLD FISH, or s'rna'rro'm), CONNECTICUT, sssrenon. 'ro-rnn READY TOOLcom-- PANY OI' BRIDGET-303T, CONNECTICUT, .A CORPORATION OF CONNECTICUT.

'rooL-nonnnit.

I Specification of Letters Patent.

I To all whom it may concern:

and use the same.

Be it known that I, HAROLD FISH, a citizen of the United States,residing at Stratford-, in the county of Fairfield and State of.Connecticut, have invenbed'certain new and useful Improvements inTool-Holders; and I do hereby declare the following tobe a 'full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make This invention relatesto tools and more particularly to boring bars and lathe tools in which aremovable cutting tool is held in a holder which is intended to befastened in a tool post or chuck of a lathe or the like.

An object of this invention is to provide a device such as a holderhaving a transverse and diagonal slotthe'rethro-ugh which slot isadapted to receive a cutting tool and a single wedge to jam the toolWithin the slot and a medium of controlling the movementof the wedge.

Another object is to provide a holderwith a diagonal aperture throughthe same near the end, said aperture flaring from one side to the otherand adapted to receive the cuttingtool and a wedge adapted to bearagainst the cut-ting tool on the opposite side of the aperture, and asecond bar extending through the holder controlled by an adjusting screwin the opposite end of the bar.

Further, objects will be apparent fromjthe following specification,appended claims and drawings in which: i

Figure 1 is a plan View of the. device;

' Fig. 2' is. a longitudinal sectional view of the device. Fig. 3 is aperspective view of the wedge. Figs. 4 and 5 are cross sectional viewsas on the lines 4-4 and 5-- 5 respectively of Fig." 2. Fig. 6 isa'perspective view' of a tool holder equipped with my invention. 'Fig. 7is a sectional view through ,the holder longitudinally.

In using a tool of this class grind the same and as the holder isrigidly held in a tool post it is necessary that some provision be madewhereby the cut-ting tool may be easily removed from the bar without thenecessity of releasing cumbersome gripping means which would causethe'holder to move from its fixed position and with the above objects inview I provide a bar 10 being similar in appearance to the usual it' isfrequently necessary to remove the cutting tool tobor'ing bar or lathetool and through the bar ad acent to one end Icut the diagonal and taperng slot; 11, ,and I also provide alongitudinal bore 12 communicatingfrom said:

slot through the opposite end of the bar. The end of the bore 12opposite to the transverse slot 11 is slightly enlarged and inter-,

nally threaded and adapted to operate in said threaded" opening is anadjusting screw 14 which is adapted to bear upon one end of a rod 15which is inserted in the bore 12. The end of the rod 15 opposite to thatwhich bears against the adjusting screw is cut away as at 16 on one sideadjacent the .end, and the opposite side is beveledas shown at 17. a

' A cutting tool of the usual design, as shown in the drawings at 18, ispassed Patented Ma 20,1913.

through the slot 11 and is adapted to bear against the wall of the slotnearest the, end of the bar; and arranged to bear against the free wallof the tool and the opposite wall of the transverse slot is a wedge 19having the edge adapted to bear against the wall of v the slot. roundedto conform with the wall of the slot, and said edge is notched as shownat 20 to provide a cam surface 21 against which the beveled end of therod 15 bears.

s The operation of the device is as folbar may be moved as to releasethe'tool when it can be taken from the tool to be reground.

I claim T 1. A tool holdercomprisinga bar, having a; transverse 'flaringbore therethrough adtherethrough from the opposite end, to saidtransverse bore, a wed e block insaid transverseboreoccupying utaportlon of sald bore, a tool in said bore between said wedge block andthe end of said bore adjacent the near end of the holder, a camfaceformed in the edge of said wedge block opposite from the toolengagingface, said cam face being formed intermediate of the ends so as'jacentone end thereof a longitudinal b'ore to permit the wedge block tohave bearing surface at each side thereof, a bar carried by said holderin' the longitudinal bore with said transverse bore, a wedge block insaid transverse bore adapted to engage a tool with one edge and theend'wall of bore iwith its opposite edge, the edge adapted to engage thebore being rounded, said wedge block having a recess formed in therounded edge intermediate of its length so as to produce bearingsurfaces at each side thereof,

said recess having a cam face substantially perpendicular -tothe generalline of the rounded edge of said wedge block, a longitudinally slidablebar in said longitudinal bore having a bevel face formed on one endthereof corresponding to the cam face of the Y wedge block, the end ofsaid bar having the general configuration of said recess in said wedgeblock, and a setscrew carried by said holder adapted to control thelongitudinal t movement of said bar in one direction.

In'testimony whereof I afiix my signature 1n presence of two w tnesses.

HAROLD FISH.

Witnesses i O. A. RAVEN, HUGO MOCK.

